A subset of the MERRA (Modern-Era Retrospective analysis for Research and Applications) reanalysis is available on ClimServ.

MERRA is a NASA reanalysis for the satellite era using a major new version (V5) of the Goddard
Earth Observing System (GEOS) Data Assimilation System (DAS). The MERRA focuses on historical
analyses of the hydrological cycle on a broad range of weather and climate time scales.
The MERRA time period covers the modern era of remotely sensed data, from 1979 through the
present,

MERRA output data resemble output at
frequencies higher than the 6-hourly analyses. Two-dimensional diagnostics (surface fluxes, radiation, single
level meteorology for those archived at IPSL) are produced at 1-hour intervals. These
data products and the 6-hourly three-dimensional atmospheric analyses are also available at the
full spatial resolution (1/2 degrees latitude × 2/3 degrees longitude).

The original files (HDF-EOS) extracted at NASA GES DISC have been converted into netcdf-3 on ClimServ.